Shock-absorber.



1. Y. STEWART BHOCK ABSORBER.

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[rpm HLED DEC. 14,1915.

J. Y. STEWART.

SHOCK ABSORBER. APPLlCATlUN FILED DEC- 14, 1915.

Patented Jan. 16, 1917 2 SHEETS-SHEET 2.

ukmar J/J'zezuarz.

A TTORNEYS citizen of the r of Van Houten, in the county of Colfax and parts the. shock absorber will not UNITED STATES PATENT OFFICE.

JAMES Y. STEWART, 01E VAN HOUTEN, NEW MEXICO.

SHOGK'ABSORBER.

Specification of Letters Patent.

ia-tented Jan. 16 1917.

Application filed December 14, 1915. Serial No. 66,714.

To all whom it may canoe m:

Be it known that l, JAMns Y. STEWART, a United States, and a. resident State of New lllexicoyhave invented a new and Improved Shoolohbsorbcr, of which the following is a full, clear, and exact desc-ription.

- My invention has for its object to rovide' sired resistance of the shock ebscn'ber, and

also in a manner which will provide a new tral zone where the shoe-l; absorber will not iunction, thereby permitting the support of the chassis under normed conditions by the automobile springs and lndependently of the shock absorber. -VVith thisconstruction, function until the chassis is moved relatively to the run;

tiongwith parts broken ning parts beyond normal running position, the shock absorber then operating to limit the movement of the chassis relatively to the running parts, the resistance of the-shock absorber increasing as the chassis moves farther from normal running position.

Still other objects of the invention will.

appear in the following specification, in which. the preferred 'form of my invention is descrlbed.

Reference is had to the accompanying drawings in which similar reference characters denote similar parts in allthe views, in which- Figure 1 is a. side elevation of my invenaway to show parts of the construction; Fig. 2 is a sectional view on the line Qr-2 of Fig. 1; Fig. 3 is a sectional view on the Fig. 415 a sectional view on the line 4--4 of Fig, 2; Figs. 5 and 6 are views showing the companion thrust members; Fig. 7 and 8 are views showing the friction disks; and Fig. 9 isan end view of the thrust members, showing how their cam surfaces contact with each other under normal conditions.

By-referring-to the, drawings, it will be seen that a. casing 10 is provided having a head 11 integral therewith, an arm 12 extending from this head 11 in a manner well understood, In the head 11 there is an opendisooscd. the bolt ing'13 inwhichiwholt 141 is that there will be no question of the 'tate freely on the bolt.

1A having t1 head 15 which abuts against the casing head ll. at the sides of the opening 13 therein. This bolt let is {angular in. cross section, as will best be seen by referring to Figs. 3 and of the drmvings, but nei er tho less, the opening 18 in the head ll is so con-- structed that the bolt may ilireely rotate in the said opening. In the casing 20 there are redial ribs it} which extend inwardly from the sides of the casing. These ribs 16 are disposed in recesses 17 at the peripheries of disks 18, these disks 18 being rotatably mounted on. the bolt let, there being dis iosed between the disks 1%, disks 19 which contact with the disks i8, and which mounted to rotate with the bolt 14,- the disks 19 having angular openings 20 which lit the bolt 14L so disks l9 rotating when the'bolt 14.- rotstes. These disks 18 and 1% are friction dis is, and con that with each other, it being understood that any desired number-of these disks may be provided with reference to the size of the casing and other conditions. These disks 18 and 19 are pressed together in the direction of the head 11 by companion thrust members 21 and the thrust member 21 l'llivlng recesses 23 in which the ribs 16 may be dis posed, so-thot the thrust member 2-1 will notote with the i si end the thrust incinber 22 having 1 opening". 53% angular in shape so that it will lit the bolt 14- and IOnj tote with the said bolt.

The opening 25 in the thrust member 21 is round, so that the thrust member 21 will ro- These thrust members 21 and 92 have contacting com snri'n-ces 26., so that when one of the thrust members is rotated relatively to the other thrust memher, the from each other by the said cam surfaces, and when the thrust member 22 is prevent-p ed from moving away from. the head 11, it will force the thrust member 21 in the direction of thesaid head by binding the trio tion disks l8 nndlQ. Disposed. around the bolt 14, and pressingv against the thrust member 22, there is a. spring 26, a. washer 27 being disposed against the said s ringand. being engaged by a head 28 whic has an angular opening 29 fitting the angular portion of the bolt 14:, So that the head 38 will rotate the bolt .14. A' washer 30 is dis posed at the outer side of the head 28, and it is engaged by a not 31 which meshes with a "threaded"terinii'ie'l 32 with which the bolt 14 thrust members will be foroednway 5 arm 33.

is provided. Extending from the head 28 there is an arm 33, it being possible to secure the arm 12 to a chassis 34, and the arm 33 to a running portionof an automobile, so

5 that the shock absorber will operatein the eustonfary manner.

It will be understood that if desired the washer 27 may .beremoved, and that one or more of the friction disks 18 and 19 may also be removed, to give as much freedom of action as required between the thrust members 21 and :22. By this means, it is possible to so adjust the shock absorber that. the arms 12 and .33 may move any desired distance relatively to each other before the shock absorber will function by the cam surfaces 26 on one of the thrust members riding up on the cam surfaces 26 of the other thrust members far enough to force the friction disks 18 and 19 apart. It isalso possible to so construct the cam surfaces 26 of the thrust members 21 and 22 as to increase the thrust at any desired rate, with the continued movement of the arm 12 relatively to the It is also possible to adjust the shock absorber on the automobile without reference to the distance of the running. part 35 from the chassis 34, and at the same time to insure that the shock absorber will not impair the value of the resiliency of movement of the automobile springs when the automobile is running under normal conditions. To facilitate this arrangement, I provide the thrust member 21 with a greater number of recesses 23 than there are ribs 16, so that the position of the thrust member '21 may be adjusted exactly with reference ito the casing 10, that the companion thrust 'ymember 22, when. its cam surfaces 26 rest 4M snugly against the cam surfaces 26 on the tthrust member 21 may be so positioned with i I zreference to the bolt 14, that the head 28 may I the disposed in place with its arm 33 extend- {f-hjg' at the desired angle relatively'to the Having thus described my inventiomwhat-- I claim as new, and desire to secure by Letters Patent, is:

' In a shock absorber, a casing having sides and a head with an opening, an arm extendwith the latter, and the other cam memberhaving recesses in its periphery'in which the ribs are disposed, the ribs beingdisposed apartin the periphery of the cam member to permit of the rotation of one of the cam members relatively to the other to adjust the cam surfaces of one of the cam members relatively to the cam surfaces of the other cam member, a springdisposed withinthe casing against the outer cam member and around the bolt, :1 second head disposed at the. spring for closing the casing, the second head engaging the shoulder of the bolt for rotating the latter, an arm extending from the second mentioned head, a nuton the bolt at the side of the second mentioned head for holdii g the second mentioned head in position ,and a l-ural-ity of disks disposed around the bolt etween the cam members and th'first mentioned head, alternate disks having in their peripheries in which the ribs on the casing are shoulder on the bolt'to rotate therewith, the

number of the disks employed being deter- 'mined by the amount of free play desired between the said two arms.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' JAMES Y.- STEWART.

Witnesses:

' TH sms WALLBANK,

Flinn HARroLn. 

